Growing Soybeans

All Growing Soybeans Content

A pair of hands holding a soybean sample with three leaves.

Plant Nutrient Analysis: Do your soybeans have the right stuff?

There has been a renewed interest in taking samples of soybean leaves for nutrient analysis as a quality control tool to ensure soil and the fertilizer programs are meeting the needs of the plant to eliminate nutrients as a yield limiting factor.

SDSU Research Shows Effects Of Volunteer Corn In Corn And Soybeans

In 2007, researchers at South Dakota State University indicated that volunteer corn is much less competitive in corn than soybean. The South Dakota study (Alms et al. 2007) evaluated the full season effect of a range of volunteer corn densities (800-14,000 plants/acre) on both corn and soybean and reported yield losses that ranged from 0% to 13% in corn and 0% to 54% in soybean.

Foliar Fertilization for Soybeans

There has been much press and interest for foliar fertilization of soybean - especially for micronutrients based on plant analysis. In general, foliar fertilization has not proven effective unless there is severe deficiency of a particular nutrient.

Nitrogen Credit: The Rest of the Story

We have all been programmed to think of soybean as fixing nitrogen from the atmosphere and adding nitrogen to the soil. The SDSU lab and most other labs give nitrogen “credit” when another crop follows soybeans.

A soybean field with green soybeans and patchy yellow areas.

Yellow Soybeans

Yellow soybean areas within fields are being noticed in some areas of the state. There are six factors which could be causing the soybean plant yellowing: nitrogen (N), potassium (K), or sulfur (S) deficiency, iron deficiency chlorosis (IDC), soybean cyst nematode (SCN), or yellow flash from Roundup application.

A soybean root with several small white cysts growing on it.

Scout and Soil Test for the Soybean Cyst Nematode

Soybean cyst nematode (SCN) is the main soybean production constraint in South Dakota. Soybean plants can be infested with SCN but may not display visible symptoms.

Soybean seed drill planting soybeans. Courtesy: Soybean Checkoff [CC BY 2.0].

Improve Soybean Profitability by Reducing Input Costs

While declining prices and increasing costs considerably reduce profit for soybean production, there are certain input costs that might be reduced to increase profitability.

A combine harvesting soybeans at sunset.

Trade Impacts on Soybeans

Agricultural trade agreements were first established in the General Agreement on Tariffs and Trade (GATT), legal treaty signed initially by 23 nations in 1947. The purpose was to promote international trade by reducing barriers such as tariffs.

a newly planted soybean field with white fertilizer sprinkled throughout

Application of Nitrogen Fertilizer in Soybeans

SDSU Extension conducted a study during the 2016 growing season at five Eastern South Dakota sites to evaluate the effects of added N fertilizer (as urea) on soybean yields.

A small, green, winged insect sitting on a soybean leaf.

First Soybean Aphid Populations Detected in South Dakota

While scouting fields this week, we observed winged (alate) soybean aphids in Southeast South Dakota.